Collapsible mandrel.



E M. LOCKWOOD.

GOLLAPSIBLE MANDREL.

APPLICATION FILED mun, 1914.

Patented May 11, 1915.

2 SHEETS-SHEET L WITNESSES ATTORNEY THE NORRIS PErERs CO4. PHOTO-LITHQ,WASHINGTON, n c.

E. M. LOCKWOOD.

COLLAPSIBLE MANDREL.

APPLICATION FILED JULYII. 1914.

1, 1 8,875.. Patented May 11, 1915.

2 SHEETS-SHEET 2.

ATTORNEY WITNESSES THE NORRIS PETERS CO. FHON LITHUU WASHINGTON. x

UNITED STATES PATENT FF1E EDWARD 1V1. LOCKWOOD, OF PHILADELPHIA,PENNSYLVANIA, ASSIGNOR TO 0. R. CARVER COMPANY, OF PHILADELPHIA,PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

COLLAPSIIBLE MANDREL.

Patented May 11, 1915.

Application filed July 17, 1914. Serial No. 851,668.

To all whom it may concern Be it known that I, EDWARD M. LOCKWOOD, acitizen of the United States, and resident of Philadelphia, county ofPhiladelphia, and State of Pennsylvania, have invented an Improvement inCollapsible Mandrels, of which the following is a specification.

This invention relates to rewinding devices for printing or embossingpresses or machines of like character and relates more particularly to acollapsible mandrel forwinding material.

The invention has for an object to provide a mandrel which operatesetliciently as a winding device for paper or like material and which maybe readily removed from the roll of wound material in order that it maybe again used for winding purposes.

It has for a further object to provide a mandrel simple in construction,comprising few parts and adapted to be easily and quickly adjusted fromcollapsed condition to operative condition or vice versa.

My invention also comprehends other details of construction which,together with those above specified will be better. understood byreference to the drawings, in which 2- Figure 1 represents a sideelevation,partly in section, of a collapsible mandrel embodying myinvention; Fig. 2 represents an end elevation of the same; Fig. 3represents a section on line 3-3 of Fig. 1; Fig. 4 represents a sideelevation of the mandrel in collapsed condition; Fig. 5 represents asection on line 5-5 of Fig. 4; Fig. 6 represents a detail of one of thefastening studs; Fig. 7 represents a side elevation of a portion of apress showing the mandrel in operative position and in relation to' thewinding adjuncts; and Fig. 8 represents a side elevation of the mandrelmounted in operative position.

Similar numerals of reference indicate corresponding parts.

1 designates the mandrel arbor consisting, in the present instance, of apolygonal shaped spindle having at one end a reduced cylindrical portion2 for bearing within a supporting journal, while at the opposite endthere is a head 3 fixed to the arbor by means of a key 4. Preferably thehead 3 is also polygonal in transverse section and is provided with acounterborcd portion 5 adapted to receive the center 6 or end of thedriving shaft as the case may be, while the body of the head seatswithin a socket member 7 of corresponding shape, which is carried by orforms a part of the re-winding ratchet 8.

9 designates a plurality of bars disposed in parallel relation withrespect to the, arbor 1 and forming together the body of the mandrel,each being respectively connected by the pivot pins 10, the links 11 andstuds 12, with the arbor 1. As here shown there are four of these bars 9each having connection with the arbor 1 by a pair of the links 11, andit will be noted that the fastening studs 12 are provided with a bearingpart 13 between the threaded portion 14 and the head 15 to permit freemovement of the links thereon. It will therefore be apparent that thesaid bars 9 may swing about the fixed pivots formed by the studs 12 andassume either a position in close proximity to the arbor 1 or a positionremoved therefrom according to the length of the said links. In order tolimit the turning movement of the links 9 in one direction the head 3 ispreferably formed of larger diameter than the arbor 1 so that itoverlaps the side edges of the links 11 whereby the movement of the saidlinks is limited in the outward direction by the said head. Each pair ofthe links 11 is pivoted to a different side of the arbor 1 so that thebars 9 are arranged substantially ninety degrees apart and each istherefore arranged to contact with the arbor in collapsed condition,though of course this arrangement may be varied within the scope of theinvention, and I do not wish to be limited thereto, or to the number ofbars employed.

In order to maintain the bars 9 in their outermost position to form thebody of the winding or rewinding mandrel, I preferably provide a collar16 mounted for sliding movement upon the arbor 1 and adapted to bemaintained in desired position by means of the set screw 17. In thepresent instance, this collar 16 is provided with a flange 18 ofsufiicient dimension to overlap or extend beyond the ends of the bars 9so that when the latter are moved to their operative position thecollar16 may be moved to abut the ends of the bars. In this position itmay be fixed by the set screw 17 to hold the parts locked.

In Figs. 7 and 8 I have shown one use of the mandrel where it isemployed as a rewinder for the wiping material 19 of a printing orembossing press wherein it is mounted with the end 2 journaled in thebracket 20 while the polygonal head 3 is mounted to turn with theratchet mechanism 8.

In the operation of the device the wiping material is automaticallyunwound from the roll 21, passes beneath the wiping mechanism 22 andthence to the mandrel 9 which rewinds it through the operation of asuitable step-by-step mechanism or the like. VVhen the wiping materialhas been com pletely wound upon the mandrel the latter is removed fromits bearings, the set screw 17 is loosened and the collar 16 may then beslipped along the arbor so that it no longer engages the mandrel bars 9.As soon as this is accomplished the mandrel and all of its parts may beremoved from the roll of wound material by grasping the head 3 anddrawing the parts outwardly as will be understood. This outward movementof the arbor causes the bars 9 to collapse to the position shown in Fig.l since the links bein g released may turn upon their respective pivotsand the device assumes the position shown in Fig. 4. The material maynow be discarded and the mandrel again. adjusted to its operativeposition by locking the collar 16 in operative position, after which itis inserted in the machine ready for another winding operation.

It will now be apparent that I have devised a simple and effective typeof mandrel wherein the same mandrel may be successively used forrewinding purposes and its removal from a roll of material isaccomplished quickly and easily without disassembling any of its parts.

It will now be apparent that I have 'devised a novel and usefulconstruction which embodies the features of advantage enumerated asdesirable, and while I have in the present instance shown and describedthe preferred embodiment thereof which has been found in practice to*give satisfactory and reliable results, it is to be understood that Ido not restrict myself to the details, as the same are susceptible ofmodification in various particulars without departing from the spirit orscope of the invention.

Having now described my invention, what I claim as new and desire toprotect by Letters Patent is 1. In a device of the character stated, anarbor having a polygonal shaped portion, a pair of links for each sideof said portion and pivoted thereto, bars pivoted respectively to eachpair of links, a head secured to said arbor at one end and forming anabutment to limit the movement of said bars in one direction, said headhaving an apertured'pornon to recelve a centering device and also havinga polygonal shape adapted to fit a socket of corresponding shape in adriving member, a collar slidingly mounted on the opposite end of saidarbor and adapted to engage the adjacent ends of said bars, and means tolock said collar in a predetermined position, whereby in one positionsaid collar maintains said bars properly positioned to form a windingmandrel, and in another position releases said bars to form a collapsedmandrel.

.2. In a device of the character stated, an

arbor having a body portion of square cross section, combinedwith barshaving a substa 'itially rectangular construction located respectivelyopposite each face of said square body portion, a pair of links for eachbar, eaclnpair of links being pivoted at one end to a face ofthe bodyportion of said .arbor and pivoted at the opposite end to the face ofthe alined bar whereby all of said bars, may be moved into contact withthe respective sides of the arbor'body, each bar seating between its ownlinks and the pair of links of the next adjacent bar, a head secured tosaid arbor and projecting beyond the side faces thereof to form anabutment in the path of movement of said bars, and a collar slidablymounted on the opposite end of said arbor from said abutment andadaptedto hold said bars in contact with said abutment to hold said barsrelatively spaced from said arbor to form a winding mandrel.

3. In a device of the character stated, an arbor having a body portionof square cross section,combined with bars located respectively oppositeeach face of said square body portion, a pair of links for each bar,each pair of links being pivoted at one end to a face of the bodyportion of said arbor and at the opposite end to the bar whereby the baris in alinement with an adjacentface, a head secured to said arbor andprojecting beyond the side faces thereof to form an abutment in the pathof movement of said bars, said head being provided with means Copies ofthis patent may be obtained for five cents each, by addressing theCommissioner of iatents,

Washington, D. 0.

